there are actually quite a few threads about this already. I was getting the same error message, but now my NA/EU server list won't even pop up. It seems mait. has been extended

Not sure how it can be extended when it hasn't reached the original end time yet?

08/25/2013 11:32 AM [Follow-up] Several Worlds Emergency Maintenance (Aug. 25): Follow-up The emergency maintenance that is currently underway on several Worlds is now scheduled to end at approximately 9:30 a.m. (PDT) on Aug. 25, 2013.

We apologize for any inconvenience this may cause for our customers and thank you for your patience.

08/25/2013 11:32 AM [Follow-up] Several Worlds Emergency Maintenance (Aug. 25): Follow-up The emergency maintenance that is currently underway on several Worlds is now scheduled to end at approximately 9:30 a.m. (PDT) on Aug. 25, 2013.

We apologize for any inconvenience this may cause for our customers and thank you for your patience.

[Date & Time] Aug. 25, 2013 from 8:30 a.m. to 9:30 a.m. (PDT)

we are 1 hour past that time now

Well this may be semantics, but it is more a case of them not shortening the original maintenance, than extending it ;)